PARIS— As if being a muse to Lady Gaga, working on charity projects and preparing her own couture retrospective at FIT wasn't enough, Daphne Guinness is also finding time to focus on one of her newest passions: cinema.

Yesterday, at the Ritz, the heiress filled us in on her interest in acting as well as producing films, starting with with her participation in pal Diane Pernet's annual film festival ASVOFF. The festival will be held in early October in Paris' Centre Pompidou and Guinness isn't just a member of the jury, she's also acting in three of the participating films—as Jean Seberg, and then as French writer Marguerite Duras—one of which she's producing.

"I never wanted to act, I always thought the world didn't need another actress," she told us. "I just say the lines as authentically as possible. I mean, if I tried to act anything it would just be awful!" But cinema, she explained, especially classics and films from the early 70s, is something she's always been curious about, "I long for this beauty, where every line and every costume played its own role."

So it's not shocking that the fashion icon's currently setting up her own production company. The first project? Turning a short, science fiction film into a feature-length movie that's midway between Invasion of the Body Snatchers and David Cronenberg's work. "I've always been fascinated by science, and the idea of bringing science and art together," she said.